Yamaha F50 Service Manual

SERVICE MANUAL
62Y-28197-3A-11290408
F50A
FT50B
FT50C 

NOTICE
This manual has been prepared by Yamaha primarily for use by Yamaha dealers and their trained
mechanics when performing maintenance procedures and repairs to Yamaha equipment. It has
been written to suit the needs of persons who have a basic understanding of the mechanical and
electrical concepts and procedures inherent in the work, for without such knowledge attempted
repairs or service to the equipment could render it unsafe or unfit for use.
Because Yamaha has a policy of continuously improving...

Contents
General information
1GEN 
INFO
Specifications
2SPEC
Periodic checks and adjustments
3CHK 
ADJ
Fuel system
4FUEL
Power unit
5POWR
Lower unit
6LOWR
Bracket unit
7BRKT
Electrical systems
8ELEC
Index
–+ 

62Y3A11
GEN 
INFO
1
2
3
4
5
6
7
8
I
General information
How to use this manual ................................................................................. 1-1
Manual format............................................................................................ 1-1
Symbols ..................................................................................................... 1-2
Safety while working...................................................................................... 1-3
Fire...

GEN 
INFO
General information
1-162Y3A11
How to use this manual1
Manual format
The format of this manual has been designed to make service procedures clear and easy to under-
stand. Use the information below as a guide for effective and quality service.
1
Parts are shown and detailed in an exploded diagram and are listed in the components list.
2
Tightening torque specifications are provided in the components list at the beginning of each
section and after a numbered step with tightening instructions.
3...

62Y3A111-2
1
2
3
4
5
6
7
8
I
Symbols
The symbols below are designed to indicate the content of a chapter.
General information
Specifications
Periodic checks and adjustments
Fuel systemPower unit
Lower unit
Bracket unit
Electrical systems
Symbols 1
 to 5
 in an exploded diagram indicate the grade of lubricant and the lubrication point.
1Apply Yamaha 4-stroke motor oil
2Apply water resistant grease (Yamaha grease A, Yamaha marine grease)
3Apply molybdenum disulfide grease
4Apply anti-corrosion grease...

GEN 
INFO
General information
1-362Y3A11
Safety while working1
To prevent an accident or injury and to
ensure quality service, follow the safety pro-
cedures provided below.
Fire prevention
Gasoline is highly flammable.
Keep gasoline and all flammable products
away from heat, sparks, and open flames.
Ventilation
Gasoline vapor and exhaust gas are heavier
than air and extremely poisonous. If inhaled
in large quantities they may cause loss of
consciousness and death within a short time.
When test running...

62Y3A111-4
1
2
3
4
5
6
7
8
I
6. Keep a supply of clean, lint-free cloths for
wiping up spills, etc.
Good working practices
Special tools
Use the recommended special tools to pro-
tect parts from damage. Use the right tool in
the right manner—do not improvise.
Tightening torques
Follow the tightening torque specifications
provided throughout the manual. When tight-
ening nuts, bolts, and screws, tighten the
large sizes first, and tighten fasteners starting
in the center and moving outward.
Non-reusable...

GEN 
INFO
General information
1-562Y3A11
Identification1
Applicable models
This manual covers the following models.
Serial number
The outboard motor serial number is
stamped on a label attached to the port
clamp bracket.
1Model name
2Approved model code
3Transom height
4Serial number
Applicable models
USA, Canada Worldwide
—F50AEHD
F50TH F50AEHT
—F50AED
F50TR F50AET
T50TR FT50BET
—FT50CEHD
—FT50CED
—FT50CET
Model nameApproved 
model codeStarting 
serial No.
USA, Canada
F50TH
62YL: 451812–
F50TR L:...